From cdea0206efeca83a0a9b57d0764b177b2e11ab7c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 10 Aug 2019 23:09:45 +0200 Subject: avcodec/ffwavesynth: Fixes invalid shift with pink noise seeking Fixes: left shift of negative value -961533698048 Fixes: 16242/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5738550670131200 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Nicolas George Signed-off-by: Michael Niedermayer --- libavcodec/ffwavesynth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c index e6d2606..cfd0951 100644 --- a/libavcodec/ffwavesynth.c +++ b/libavcodec/ffwavesynth.c @@ -220,7 +220,7 @@ static void wavesynth_seek(struct wavesynth_context *ws, int64_t ts) int64_t pink_ts_cur = (ws->cur_ts + PINK_UNIT - 1) & ~(PINK_UNIT - 1); int64_t pink_ts_next = ts & ~(PINK_UNIT - 1); int pos = ts & (PINK_UNIT - 1); - lcg_seek(&ws->pink_state, (pink_ts_next - pink_ts_cur) << 1); + lcg_seek(&ws->pink_state, (pink_ts_next - pink_ts_cur) * 2); if (pos) { pink_fill(ws); ws->pink_pos = pos; -- cgit v1.1